C++ (Cpp) pcf8591_init_client示例

示例#1

文件： pcf8591.c 项目： MiniBlu/cm11_kernel_htc_msm8974a3ul

static int pcf8591_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
{
    struct pcf8591_data *data;
    int err;

    data = kzalloc(sizeof(struct pcf8591_data), GFP_KERNEL);
    if (!data) {
        err = -ENOMEM;
        goto exit;
    }

    i2c_set_clientdata(client, data);
    mutex_init(&data->update_lock);


    pcf8591_init_client(client);


    err = sysfs_create_group(&client->dev.kobj, &pcf8591_attr_group);
    if (err)
        goto exit_kfree;


    if (input_mode != 3) {
        err = device_create_file(&client->dev, &dev_attr_in2_input);
        if (err)
            goto exit_sysfs_remove;
    }


    if (input_mode == 0) {
        err = device_create_file(&client->dev, &dev_attr_in3_input);
        if (err)
            goto exit_sysfs_remove;
    }

    data->hwmon_dev = hwmon_device_register(&client->dev);
    if (IS_ERR(data->hwmon_dev)) {
        err = PTR_ERR(data->hwmon_dev);
        goto exit_sysfs_remove;
    }

    return 0;

exit_sysfs_remove:
    sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
    sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
exit_kfree:
    kfree(data);
exit:
    return err;
}

示例#2

文件： pcf8591.c 项目： Claruarius/stblinux-2.6.37

static int pcf8591_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
{
    struct pcf8591_data *data;
    int err;

    if (!(data = kzalloc(sizeof(struct pcf8591_data), GFP_KERNEL))) {
        err = -ENOMEM;
        goto exit;
    }

    i2c_set_clientdata(client, data);
    mutex_init(&data->update_lock);

    /* Initialize the PCF8591 chip */
    pcf8591_init_client(client);

    /* Register sysfs hooks */
    err = sysfs_create_group(&client->dev.kobj, &pcf8591_attr_group);
    if (err)
        goto exit_kfree;

    /* Register input2 if not in "two differential inputs" mode */
    if (input_mode != 3) {
        if ((err = device_create_file(&client->dev,
                                      &dev_attr_in2_input)))
            goto exit_sysfs_remove;
    }

    /* Register input3 only in "four single ended inputs" mode */
    if (input_mode == 0) {
        if ((err = device_create_file(&client->dev,
                                      &dev_attr_in3_input)))
            goto exit_sysfs_remove;
    }

    data->hwmon_dev = hwmon_device_register(&client->dev);
    if (IS_ERR(data->hwmon_dev)) {
        err = PTR_ERR(data->hwmon_dev);
        goto exit_sysfs_remove;
    }

    return 0;

exit_sysfs_remove:
    sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
    sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
exit_kfree:
    kfree(data);
exit:
    return err;
}